: AVR (Automatic Voltage Regulation) . It corrects minor power fluctuations (brownouts) without switching to battery, extending battery life.

: Ensure there are enough "Battery + Surge" outlets for your critical gear. Other outlets may be "Surge Only."

: Essential for sensitive electronics and high-end PC power supplies.

: Cheaper; fine for basic lamps, monitors, or older electronics.

: Sine Wave Output . Modern gaming PCs with Active PFC power supplies run better and safer on pure sine wave power during a blackout.